1 files changed, 83 insertions, 0 deletions
diff --git a/dom/base/nsNameSpaceManager.h b/dom/base/nsNameSpaceManager.h
new file mode 100644
index 000000000..d5c3a25fe
--- /dev/null
+++ b/dom/base/nsNameSpaceManager.h
@@ -0,0 +1,83 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef nsNameSpaceManager_h___
+#define nsNameSpaceManager_h___
+
+#include "nsDataHashtable.h"
+#include "nsHashKeys.h"
+#include "nsIAtom.h"
+#include "nsIDocument.h"
+#include "nsIObserver.h"
+#include "nsTArray.h"
+
+#include "mozilla/StaticPtr.h"
+
+class nsAString;
+
+/**
+ * The Name Space Manager tracks the association between a NameSpace
+ * URI and the int32_t runtime id. Mappings between NameSpaces and 
+ * NameSpace prefixes are managed by nsINameSpaces.
+ *
+ * All NameSpace URIs are stored in a global table so that IDs are
+ * consistent accross the app. NameSpace IDs are only consistent at runtime
+ * ie: they are not guaranteed to be consistent accross app sessions.
+ *
+ * The nsNameSpaceManager needs to have a live reference for as long as
+ * the NameSpace IDs are needed.
+ *
+ */
+
+class nsNameSpaceManager final : public nsIObserver
+{
+public:
+  NS_DECL_ISUPPORTS
+  NS_DECL_NSIOBSERVER
+  virtual nsresult RegisterNameSpace(const nsAString& aURI,
+                                     int32_t& aNameSpaceID);
+
+  virtual nsresult GetNameSpaceURI(int32_t aNameSpaceID, nsAString& aURI);
+
+  // Returns the atom for the namespace URI associated with the given ID. The
+  // ID must be within range and not be kNameSpaceID_None (i.e. zero);
+  nsIAtom* NameSpaceURIAtom(int32_t aNameSpaceID) {
+    MOZ_ASSERT(aNameSpaceID > 0);
+    return NameSpaceURIAtomForServo(aNameSpaceID);
+  }
+
+  // NB: This function should only be called by Servo code (and the above
+  // accessor), which uses the empty atom to represent kNameSpaceID_None.
+  nsIAtom* NameSpaceURIAtomForServo(int32_t aNameSpaceID) {
+    MOZ_ASSERT(aNameSpaceID >= 0);
+    MOZ_ASSERT((int64_t) aNameSpaceID < (int64_t) mURIArray.Length());
+    return mURIArray.ElementAt(aNameSpaceID);
+  }
+
+  int32_t GetNameSpaceID(const nsAString& aURI,
+                         bool aInChromeDoc);
+  int32_t GetNameSpaceID(nsIAtom* aURI,
+                         bool aInChromeDoc);
+
+  bool HasElementCreator(int32_t aNameSpaceID);
+
+  static nsNameSpaceManager* GetInstance();
+  bool mMathMLDisabled;
+
+private:
+  bool Init();
+  nsresult AddNameSpace(already_AddRefed<nsIAtom> aURI, const int32_t aNameSpaceID);
+  nsresult AddDisabledNameSpace(already_AddRefed<nsIAtom> aURI, const int32_t aNameSpaceID);
+  ~nsNameSpaceManager() {};
+
+  nsDataHashtable<nsISupportsHashKey, int32_t> mURIToIDTable;
+  nsDataHashtable<nsISupportsHashKey, int32_t> mDisabledURIToIDTable;
+  nsTArray<nsCOMPtr<nsIAtom>> mURIArray;
+
+  static mozilla::StaticRefPtr<nsNameSpaceManager> sInstance;
+};
+ 
+#endif // nsNameSpaceManager_h___